Photographer: Patrick T. Fallon/Bloomberg

Chipotle Not the Only Fast-Casual Chain That's Suffering: Chart

Chipotle Mexican Grill Inc., still reeling from a series of foodborne-illness outbreaks, isn’t the only fast-casual restaurant that suffered last year. An index of eight fast-casual restaurant stocks, including Noodles & Co. and Potbelly Corp., tumbled 24 percent in 2015. Compare that with the Standard & Poor’s 500 Restaurants Index, which gained 22 percent.

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